19772519650993 has 2 divisors, whose sum is σ = 19772519650994. Its totient is φ = 19772519650992.

The previous prime is 19772519650907. The next prime is 19772519651009. The reversal of 19772519650993 is 39905691527791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19605519107344 + 167000543649 = 4427812^2 + 408657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19772519650993 is a prime.

It is not a weakly prime, because it can be changed into another prime (19772519653993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9886259825496 + 9886259825497.

It is an arithmetic number, because the mean of its divisors is an integer number (9886259825497).

Almost surely, 2^{19772519650993} is an apocalyptic number.

It is an amenable number.

19772519650993 is a deficient number, since it is larger than the sum of its proper divisors (1).

19772519650993 is an equidigital number, since it uses as much as digits as its factorization.

19772519650993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 289340100, while the sum is 73.

The spelling of 19772519650993 in words is "nineteen trillion, seven hundred seventy-two billion, five hundred nineteen million, six hundred fifty thousand, nine hundred ninety-three".